import requests
from bs4 import BeautifulSoup

url = ("http://scxk.nmpa.gov.cn:81/xk/")

headers={
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36'
}
response = requests.get(url=url,headers=headers)

response.encoding = "utf-8"\

page_text = response.text

soup = BeautifulSoup(page_text,"html.parser")
list = soup.select("#FileItems")
print(list)